Cover Page - shares	3 Months Ended
	Mar. 31, 2026	Apr. 30, 2026
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2026
Document Transition Report	false
Entity File Number	001-40332
Entity Registrant Name	agilon health, inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	37-1915147
Entity Address, Address Line One	440 Polaris Parkway
Entity Address, Address Line Two	Suite 550
Entity Address, City or Town	Westerville
Entity Address, State or Province	OH
Entity Address, Postal Zip Code	43082
City Area Code	(562)
Local Phone Number	256-3800
Title of 12(b) Security	Common stock, $0.01 par value
Trading Symbol	AGL
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		16,683,786
Entity Central Index Key	0001831097
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2026
Document Fiscal Period Focus	Q1
Amendment flag	false